Don't under estimate all the bad luck that happened to them as well. Your point is 100% valid all those startups look great on paper and fail. That also means startups that do NOT sound sound might be the next big thing.
Absolutely accurate, but I think to your point this is the same relationship between companies and employees.
As your product becomes more monopolistic, demand more from users, and you also become the company really smart people want to work at. Thus furthers your innovation which leads to more monopolistic products.